| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | #include <stdio.h> |
| 2 | #include <string.h> |
| 3 | |
| 4 | |
| 5 | static int |
| 6 | do_test (void) |
| 7 | { |
| 8 | size_t size; |
| 9 | char *buf; |
| 10 | FILE *fp = open_memstream (&buf, &size); |
| 11 | if (fp == NULL) |
| 12 | { |
| 13 | puts ("open_memstream failed"); |
| 14 | return 1; |
| 15 | } |
| 16 | |
| 17 | off64_t off = ftello64 (fp); |
| 18 | if (off != 0) |
| 19 | { |
| 20 | puts ("initial position wrong"); |
| 21 | return 1; |
| 22 | } |
| 23 | |
| 24 | if (fseek (fp, 32768, SEEK_SET) != 0) |
| 25 | { |
| 26 | puts ("fseek failed"); |
| 27 | return 1; |
| 28 | } |
| 29 | |
| 30 | if (fputs ("foo", fp) == EOF) |
| 31 | { |
| 32 | puts ("fputs failed"); |
| 33 | return 1; |
| 34 | } |
| 35 | |
| 36 | if (fclose (fp) == EOF) |
| 37 | { |
| 38 | puts ("fclose failed"); |
| 39 | return 1; |
| 40 | } |
| 41 | |
| 42 | if (size != 32768 + 3) |
| 43 | { |
| 44 | printf ("expected size %d, got %zu\n", 32768 + 3, size); |
| 45 | return 1; |
| 46 | } |
| 47 | |
| 48 | for (int i = 0; i < 32768; ++i) |
| 49 | if (buf[i] != '\0') |
| 50 | { |
| 51 | printf ("byte at offset %d is %#hhx\n", i, buf[i]); |
| 52 | return 1; |
| 53 | } |
| 54 | |
| 55 | if (memcmp (buf + 32768, "foo", 3) != 0) |
| 56 | { |
| 57 | puts ("written string incorrect"); |
| 58 | return 1; |
| 59 | } |
| 60 | |
| 61 | /* Mark the buffer. */ |
| 62 | memset (buf, 'A', size); |
| 63 | free (buf); |
| 64 | |
| 65 | /* Try again, this time with write mode enabled before the seek. */ |
| 66 | fp = open_memstream (&buf, &size); |
| 67 | if (fp == NULL) |
| 68 | { |
| 69 | puts ("2nd open_memstream failed"); |
| 70 | return 1; |
| 71 | } |
| 72 | |
| 73 | off = ftello64 (fp); |
| 74 | if (off != 0) |
| 75 | { |
| 76 | puts ("2nd initial position wrong"); |
| 77 | return 1; |
| 78 | } |
| 79 | |
| 80 | if (fputs ("bar", fp) == EOF) |
| 81 | { |
| 82 | puts ("2nd fputs failed"); |
| 83 | return 1; |
| 84 | } |
| 85 | |
| 86 | if (fseek (fp, 32768, SEEK_SET) != 0) |
| 87 | { |
| 88 | puts ("2nd fseek failed"); |
| 89 | return 1; |
| 90 | } |
| 91 | |
| 92 | if (fputs ("foo", fp) == EOF) |
| 93 | { |
| 94 | puts ("3rd fputs failed"); |
| 95 | return 1; |
| 96 | } |
| 97 | |
| 98 | if (fclose (fp) == EOF) |
| 99 | { |
| 100 | puts ("2nd fclose failed"); |
| 101 | return 1; |
| 102 | } |
| 103 | |
| 104 | if (size != 32768 + 3) |
| 105 | { |
| 106 | printf ("2nd expected size %d, got %zu\n", 32768 + 3, size); |
| 107 | return 1; |
| 108 | } |
| 109 | |
| 110 | if (memcmp (buf, "bar", 3) != 0) |
| 111 | { |
| 112 | puts ("initial string incorrect in 2nd try"); |
| 113 | return 1; |
| 114 | } |
| 115 | |
| 116 | for (int i = 3; i < 32768; ++i) |
| 117 | if (buf[i] != '\0') |
| 118 | { |
| 119 | printf ("byte at offset %d is %#hhx in 2nd try\n", i, buf[i]); |
| 120 | return 1; |
| 121 | } |
| 122 | |
| 123 | if (memcmp (buf + 32768, "foo", 3) != 0) |
| 124 | { |
| 125 | puts ("written string incorrect in 2nd try"); |
| 126 | return 1; |
| 127 | } |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | #define TEST_FUNCTION do_test () |
| 133 | #include "../test-skeleton.c" |